“The Navaho are a pastoral, semi-nomadic people whose activities centre in their flocks and small farms. Their reservation of more than fourteen thousand square miles is in the desert plateau region of Northern Arizona and New Mexico. Its mesas...

(14,462kb pdf) Gladwin compares the previous work done on the architecture of the Flagstaff culture by Colton, Spicer, McGregor and Hargrave with tree-ring dating done by Douglass and McGregor and concludes that the tree-rings dates are in direct...

109 pages (PDF version). File size: 3161 KB. "A considerable number of asphalt concrete overlays do not attain specifhed density requirements during construction. Although density is a function of many variables such as mix characteristics,...